Fluid material dispensing syringe

Details Fluid material dispensing syringe Fluid material dispensing syringe

A - Human Necessities

61

M

A61M 5/00 (2006.01) A61M 5/145 (2006.01)

Patent

CA 2407079

A dental syringe (10) has a needle (11) affixed to a carpule holder (12), which carpule holder (12) is affixed to a power drive unit (13). A harpoon (20) is provided to affix the drive unit to the carpule plunger (32). The harpoon (20) is made of stainless steel or other hard, corrosion resistant, sterilizable, material. Harpoon (20) has a unique barb geometry and hardened, knife-like edges (21). The syringe (10) may operate to divide the delivery of anesthesia into two phases. According to the method, during the first about 10 seconds of the injection, anesthetic is delivered at an extremely slow rate to maximize patient comfort. The injection rate then automatically increases to the preprogrammed rate associated with the injection type selected.

L'invention concerne une seringue dentaire (10) pr~sentant une aiguille (11) fix~e ~ un porte-carpule (12), lequel porte-carpule (12) est fix~ ~ une unit~ d'entra¹nement (13). Un harpon (20) est pr~vu pour fixer l'unit~ d'entra¹nement au piston (32) ~ carpule. Le harpon (20) est en acier inoxydable ou constitu~ d'un autre mat~riau dur anticorrosion st~rilisable. Le harpon (20) pr~sente une g~om~trie de barbe unique et des bords durcis (21) en forme de couteau. La seringue (10) peut fonctionner de mani­re ~ diviser l'administration de l'anesth~sie en deux phases. Selon le proc~d~, pendant environ les premi­res 10 secondes de l'injection, l'anesth~siant est administr~ ~ un d~bit extrÚmement faible afin de maximiser le confort du patient. Le d~bit d'injection augmente ensuite automatiquement pour atteindre le d~bit pr~programm~ associ~ au type d'injection s~lectionn~.

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